In the interval [0,1], take any two numbers a and B, and the probability of two real numbers of equation x2 + ax + B2 = 0 is () A. 18B. 14C. 12D. 34

In the interval [0,1], take any two numbers a and B, and the probability of two real numbers of equation x2 + ax + B2 = 0 is () A. 18B. 14C. 12D. 34

If the two parts of the equation x2 + ax + B2 = 0 are both real numbers, then: △ = a2-4b2 ≥ 0, that is: (a-2b) (a + 2b) ≥ 0, that is, the area of the region composed of a-2b ≥ 0 is 14, the area of the region composed of any two numbers a and B in the interval [0, 1] is 1, and the probability of the two parts of the equation x2 + ax + B2 = 0 being both real numbers is 14; therefore, B is selected